15.一个圆柱体和一个圆锥体等底等高,它们的体积相差18cm3,这个圆锥体的体积是( )
| A. | 4.5 cm3 | B. | 9 cm3 | C. | 18 cm3 | D. | 27 cm3 |
14.把一个底面半径是2厘米的圆柱,锯成6个小圆柱,表面积增加( )平方厘米.
| A. | 12.56 | B. | 75.36 | C. | 25.15 | D. | 125.6 |
13.王阿姨把5000元存入银行,定期6个月,年利率2.80%,到期时她可从银行得到多少利息?列式为( )
| A. | 5000×2.80% | B. | 5000×2.80%×6 | ||
| C. | 5000×2.80%×0.5 | D. | 5000+5000×2.80%×0.5 |
12.公园新建一个圆柱形喷水池,容积是37.68立方米,池内半径是2米,那么这个水池深( )米.
0 136451 136459 136465 136469 136475 136477 136481 136487 136489 136495 136501 136505 136507 136511 136517 136519 136525 136529 136531 136535 136537 136541 136543 136545 136546 136547 136549 136550 136551 136553 136555 136559 136561 136565 136567 136571 136577 136579 136585 136589 136591 136595 136601 136607 136609 136615 136619 136621 136627 136631 136637 136645 199269
| A. | 2 | B. | 3 | C. | 0.6 | D. | 5 |